1. The small flexible suction catheter they inserted through the endotracheal tube stopped at 19 cm, the point at which the pilot balloon line inserts, i.e., where the cuff is starting to inflate. Did the authors attempt to let the cuff down? This should be considered as the first option for a possible treatment of an airway obstruction. The cuff could have herniated into the lumen of the endot...

one of the disadvantages of conventional milling tools is to produce a large amount of heat in cutting zone and so making the tool warmer. as a result, the tool would be worn and its life time would be reduced. therefore, in long time machining, it is essential to change inserts and tools, continiously. a milling tool with self rotary cutting inserts was designed and manufactured that enables i...

The present investigation constitutes CFD analysis of the heat transmission phenomenon in a tube exchanger with Y-shaped insert triangular perforation. is accomplished by considering air as working fluid Reynolds number ranging from 3000 to 21,000. segment considered for consists circular 68 mm diameter and 1.5 m length. geometrical parameter perforation index (0%, 10%, 20%, 30%). constant flux...

We report an investigation on the accuracy of dose calculation based on the cone-beam computed tomography (CBCT) images of the nonbowtie filter kV imaging system of the Vero linear accelerator. Different sets of materials and tube voltages were employed to generate the Hounsfield unit lookup tables (HLUTs) for both CBCT and fan-beam CT (FBCT) systems. The HLUTs were then implemented for the dos...

Effects of insertion of coiled wire in juxtaposition with twisted tapes on heat transfer rate and solar radiation without disturbing the flow inside the riser tubes in a solar flat plate collector is experimentally reconnoitered in this present work. The wire coil used as a turbulator is placed inside the riser tube while the twisted tape is inserted into the wire coil to create a continuous sw...

A Pulsating Heat Pipe (PHP), specifically designed to be hosted on board the Transfer Host of International Space Station, is tested in microgravity conditions during 67th Parabolic Flight Campaign promoted by European Agency. The device consists an aluminium tube (inner/outer diameter = 3/5 mm) closed a 14 turns loop, half filled with FC-72. PHP external wall temperature distribution are measu...

One of the disadvantages of conventional milling tools is to produce a large amount of heat in cutting zone and so making the tool warmer. As a result, the tool would be worn and its life time would be reduced. Therefore, in long time machining, it is essential to change inserts and tools, continiously. A milling tool with self rotary cutting inserts was designed and manufactured that enables i...

In this paper, experimentally derived correlations of heat transfer and pressure drop are used in a Pareto based Multi-Objective Optimization (MOO) approach to find the best possible combinations of heat transfer and pressure drop of TiO2-water nanofluid flow in tubes fitted with multiple twisted tape inserts in different arrangement. In this study there are four independent design variables: t...